1/* 2 * SuperH Video Output Unit (VOU) driver 3 * 4 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <linux/dma-mapping.h> 12#include <linux/delay.h> 13#include <linux/errno.h> 14#include <linux/fs.h> 15#include <linux/i2c.h> 16#include <linux/init.h> 17#include <linux/interrupt.h> 18#include <linux/kernel.h> 19#include <linux/platform_device.h> 20#include <linux/pm_runtime.h> 21#include <linux/slab.h> 22#include <linux/videodev2.h> 23#include <linux/module.h> 24 25#include <media/sh_vou.h> 26#include <media/v4l2-common.h> 27#include <media/v4l2-device.h> 28#include <media/v4l2-ioctl.h> 29#include <media/v4l2-mediabus.h> 30#include <media/videobuf-dma-contig.h> 31 32/* Mirror addresses are not available for all registers */ 33#define VOUER 0 34#define VOUCR 4 35#define VOUSTR 8 36#define VOUVCR 0xc 37#define VOUISR 0x10 38#define VOUBCR 0x14 39#define VOUDPR 0x18 40#define VOUDSR 0x1c 41#define VOUVPR 0x20 42#define VOUIR 0x24 43#define VOUSRR 0x28 44#define VOUMSR 0x2c 45#define VOUHIR 0x30 46#define VOUDFR 0x34 47#define VOUAD1R 0x38 48#define VOUAD2R 0x3c 49#define VOUAIR 0x40 50#define VOUSWR 0x44 51#define VOURCR 0x48 52#define VOURPR 0x50 53 54enum sh_vou_status { 55 SH_VOU_IDLE, 56 SH_VOU_INITIALISING, 57 SH_VOU_RUNNING, 58}; 59 60#define VOU_MAX_IMAGE_WIDTH 720 61#define VOU_MAX_IMAGE_HEIGHT 576 62 63struct sh_vou_device { 64 struct v4l2_device v4l2_dev; 65 struct video_device vdev; 66 atomic_t use_count; 67 struct sh_vou_pdata *pdata; 68 spinlock_t lock; 69 void __iomem *base; 70 /* State information */ 71 struct v4l2_pix_format pix; 72 struct v4l2_rect rect; 73 struct list_head queue; 74 v4l2_std_id std; 75 int pix_idx; 76 struct videobuf_buffer *active; 77 enum sh_vou_status status; 78 struct mutex fop_lock; 79}; 80 81struct sh_vou_file { 82 struct videobuf_queue vbq; 83}; 84 85/* Register access routines for sides A, B and mirror addresses */ 86static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg, 87 u32 value) 88{ 89 __raw_writel(value, vou_dev->base + reg); 90} 91 92static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg, 93 u32 value) 94{ 95 __raw_writel(value, vou_dev->base + reg); 96 __raw_writel(value, vou_dev->base + reg + 0x1000); 97} 98 99static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg, 100 u32 value) 101{ 102 __raw_writel(value, vou_dev->base + reg + 0x2000); 103} 104 105static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg) 106{ 107 return __raw_readl(vou_dev->base + reg); 108} 109 110static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg, 111 u32 value, u32 mask) 112{ 113 u32 old = __raw_readl(vou_dev->base + reg); 114 115 value = (value & mask) | (old & ~mask); 116 __raw_writel(value, vou_dev->base + reg); 117} 118 119static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg, 120 u32 value, u32 mask) 121{ 122 sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask); 123} 124 125static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg, 126 u32 value, u32 mask) 127{ 128 sh_vou_reg_a_set(vou_dev, reg, value, mask); 129 sh_vou_reg_b_set(vou_dev, reg, value, mask); 130} 131 132struct sh_vou_fmt { 133 u32 pfmt; 134 char *desc; 135 unsigned char bpp; 136 unsigned char rgb; 137 unsigned char yf; 138 unsigned char pkf; 139}; 140 141/* Further pixel formats can be added */ 142static struct sh_vou_fmt vou_fmt[] = { 143 { 144 .pfmt = V4L2_PIX_FMT_NV12, 145 .bpp = 12, 146 .desc = "YVU420 planar", 147 .yf = 0, 148 .rgb = 0, 149 }, 150 { 151 .pfmt = V4L2_PIX_FMT_NV16, 152 .bpp = 16, 153 .desc = "YVYU planar", 154 .yf = 1, 155 .rgb = 0, 156 }, 157 { 158 .pfmt = V4L2_PIX_FMT_RGB24, 159 .bpp = 24, 160 .desc = "RGB24", 161 .pkf = 2, 162 .rgb = 1, 163 }, 164 { 165 .pfmt = V4L2_PIX_FMT_RGB565, 166 .bpp = 16, 167 .desc = "RGB565", 168 .pkf = 3, 169 .rgb = 1, 170 }, 171 { 172 .pfmt = V4L2_PIX_FMT_RGB565X, 173 .bpp = 16, 174 .desc = "RGB565 byteswapped", 175 .pkf = 3, 176 .rgb = 1, 177 }, 178}; 179 180static void sh_vou_schedule_next(struct sh_vou_device *vou_dev, 181 struct videobuf_buffer *vb) 182{ 183 dma_addr_t addr1, addr2; 184 185 addr1 = videobuf_to_dma_contig(vb); 186 switch (vou_dev->pix.pixelformat) { 187 case V4L2_PIX_FMT_NV12: 188 case V4L2_PIX_FMT_NV16: 189 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height; 190 break; 191 default: 192 addr2 = 0; 193 } 194 195 sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1); 196 sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2); 197} 198 199static void sh_vou_stream_start(struct sh_vou_device *vou_dev, 200 struct videobuf_buffer *vb) 201{ 202 unsigned int row_coeff; 203#ifdef __LITTLE_ENDIAN 204 u32 dataswap = 7; 205#else 206 u32 dataswap = 0; 207#endif 208 209 switch (vou_dev->pix.pixelformat) { 210 default: 211 case V4L2_PIX_FMT_NV12: 212 case V4L2_PIX_FMT_NV16: 213 row_coeff = 1; 214 break; 215 case V4L2_PIX_FMT_RGB565: 216 dataswap ^= 1; 217 case V4L2_PIX_FMT_RGB565X: 218 row_coeff = 2; 219 break; 220 case V4L2_PIX_FMT_RGB24: 221 row_coeff = 3; 222 break; 223 } 224 225 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap); 226 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff); 227 sh_vou_schedule_next(vou_dev, vb); 228} 229 230static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb) 231{ 232 BUG_ON(in_interrupt()); 233 234 /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */ 235 videobuf_waiton(vq, vb, 0, 0); 236 videobuf_dma_contig_free(vq, vb); 237 vb->state = VIDEOBUF_NEEDS_INIT; 238} 239 240/* Locking: caller holds fop_lock mutex */ 241static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count, 242 unsigned int *size) 243{ 244 struct video_device *vdev = vq->priv_data; 245 struct sh_vou_device *vou_dev = video_get_drvdata(vdev); 246 247 *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width * 248 vou_dev->pix.height / 8; 249 250 if (*count < 2) 251 *count = 2; 252 253 /* Taking into account maximum frame size, *count will stay >= 2 */ 254 if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024) 255 *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size); 256 257 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): count=%d, size=%d\n", __func__, 258 *count, *size); 259 260 return 0; 261} 262 263/* Locking: caller holds fop_lock mutex */ 264static int sh_vou_buf_prepare(struct videobuf_queue *vq, 265 struct videobuf_buffer *vb, 266 enum v4l2_field field) 267{ 268 struct video_device *vdev = vq->priv_data; 269 struct sh_vou_device *vou_dev = video_get_drvdata(vdev); 270 struct v4l2_pix_format *pix = &vou_dev->pix; 271 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8; 272 int ret; 273 274 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 275 276 if (vb->width != pix->width || 277 vb->height != pix->height || 278 vb->field != pix->field) { 279 vb->width = pix->width; 280 vb->height = pix->height; 281 vb->field = field; 282 if (vb->state != VIDEOBUF_NEEDS_INIT) 283 free_buffer(vq, vb); 284 } 285 286 vb->size = vb->height * bytes_per_line; 287 if (vb->baddr && vb->bsize < vb->size) { 288 /* User buffer too small */ 289 dev_warn(vq->dev, "User buffer too small: [%zu] @ %lx\n", 290 vb->bsize, vb->baddr); 291 return -EINVAL; 292 } 293 294 if (vb->state == VIDEOBUF_NEEDS_INIT) { 295 ret = videobuf_iolock(vq, vb, NULL); 296 if (ret < 0) { 297 dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n", 298 vb->memory, ret); 299 return ret; 300 } 301 vb->state = VIDEOBUF_PREPARED; 302 } 303 304 dev_dbg(vou_dev->v4l2_dev.dev, 305 "%s(): fmt #%d, %u bytes per line, phys %pad, type %d, state %d\n", 306 __func__, vou_dev->pix_idx, bytes_per_line, 307 ({ dma_addr_t addr = videobuf_to_dma_contig(vb); &addr; }), 308 vb->memory, vb->state); 309 310 return 0; 311} 312 313/* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */ 314static void sh_vou_buf_queue(struct videobuf_queue *vq, 315 struct videobuf_buffer *vb) 316{ 317 struct video_device *vdev = vq->priv_data; 318 struct sh_vou_device *vou_dev = video_get_drvdata(vdev); 319 320 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 321 322 vb->state = VIDEOBUF_QUEUED; 323 list_add_tail(&vb->queue, &vou_dev->queue); 324 325 if (vou_dev->status == SH_VOU_RUNNING) { 326 return; 327 } else if (!vou_dev->active) { 328 vou_dev->active = vb; 329 /* Start from side A: we use mirror addresses, so, set B */ 330 sh_vou_reg_a_write(vou_dev, VOURPR, 1); 331 dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n", 332 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR)); 333 sh_vou_schedule_next(vou_dev, vb); 334 /* Only activate VOU after the second buffer */ 335 } else if (vou_dev->active->queue.next == &vb->queue) { 336 /* Second buffer - initialise register side B */ 337 sh_vou_reg_a_write(vou_dev, VOURPR, 0); 338 sh_vou_stream_start(vou_dev, vb); 339 340 /* Register side switching with frame VSYNC */ 341 sh_vou_reg_a_write(vou_dev, VOURCR, 5); 342 dev_dbg(vou_dev->v4l2_dev.dev, "%s: second buffer status 0x%x\n", 343 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR)); 344 345 /* Enable End-of-Frame (VSYNC) interrupts */ 346 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004); 347 /* Two buffers on the queue - activate the hardware */ 348 349 vou_dev->status = SH_VOU_RUNNING; 350 sh_vou_reg_a_write(vou_dev, VOUER, 0x107); 351 } 352} 353 354static void sh_vou_buf_release(struct videobuf_queue *vq, 355 struct videobuf_buffer *vb) 356{ 357 struct video_device *vdev = vq->priv_data; 358 struct sh_vou_device *vou_dev = video_get_drvdata(vdev); 359 unsigned long flags; 360 361 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 362 363 spin_lock_irqsave(&vou_dev->lock, flags); 364 365 if (vou_dev->active == vb) { 366 /* disable output */ 367 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1); 368 /* ...but the current frame will complete */ 369 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000); 370 vou_dev->active = NULL; 371 } 372 373 if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) { 374 vb->state = VIDEOBUF_ERROR; 375 list_del(&vb->queue); 376 } 377 378 spin_unlock_irqrestore(&vou_dev->lock, flags); 379 380 free_buffer(vq, vb); 381} 382 383static struct videobuf_queue_ops sh_vou_video_qops = { 384 .buf_setup = sh_vou_buf_setup, 385 .buf_prepare = sh_vou_buf_prepare, 386 .buf_queue = sh_vou_buf_queue, 387 .buf_release = sh_vou_buf_release, 388}; 389 390/* Video IOCTLs */ 391static int sh_vou_querycap(struct file *file, void *priv, 392 struct v4l2_capability *cap) 393{ 394 struct sh_vou_device *vou_dev = video_drvdata(file); 395 396 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 397 398 strlcpy(cap->card, "SuperH VOU", sizeof(cap->card)); 399 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; 400 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 401 return 0; 402} 403 404/* Enumerate formats, that the device can accept from the user */ 405static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv, 406 struct v4l2_fmtdesc *fmt) 407{ 408 struct sh_vou_device *vou_dev = video_drvdata(file); 409 410 if (fmt->index >= ARRAY_SIZE(vou_fmt)) 411 return -EINVAL; 412 413 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 414 415 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 416 strlcpy(fmt->description, vou_fmt[fmt->index].desc, 417 sizeof(fmt->description)); 418 fmt->pixelformat = vou_fmt[fmt->index].pfmt; 419 420 return 0; 421} 422 423static int sh_vou_g_fmt_vid_out(struct file *file, void *priv, 424 struct v4l2_format *fmt) 425{ 426 struct sh_vou_device *vou_dev = video_drvdata(file); 427 428 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 429 430 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 431 fmt->fmt.pix = vou_dev->pix; 432 433 return 0; 434} 435 436static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4}; 437static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1}; 438static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3}; 439static const unsigned char vou_scale_v_num[] = {1, 2, 4}; 440static const unsigned char vou_scale_v_den[] = {1, 1, 1}; 441static const unsigned char vou_scale_v_fld[] = {0, 1}; 442 443static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev, 444 int pix_idx, int w_idx, int h_idx) 445{ 446 struct sh_vou_fmt *fmt = vou_fmt + pix_idx; 447 unsigned int black_left, black_top, width_max, 448 frame_in_height, frame_out_height, frame_out_top; 449 struct v4l2_rect *rect = &vou_dev->rect; 450 struct v4l2_pix_format *pix = &vou_dev->pix; 451 u32 vouvcr = 0, dsr_h, dsr_v; 452 453 if (vou_dev->std & V4L2_STD_525_60) { 454 width_max = 858; 455 /* height_max = 262; */ 456 } else { 457 width_max = 864; 458 /* height_max = 312; */ 459 } 460 461 frame_in_height = pix->height / 2; 462 frame_out_height = rect->height / 2; 463 frame_out_top = rect->top / 2; 464 465 /* 466 * Cropping scheme: max useful image is 720x480, and the total video 467 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts 468 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock, 469 * of which the first 33 / 25 clocks HSYNC must be held active. This 470 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods. 471 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives 472 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area, 473 * beyond DSR, specified on the left and top by the VPR register "black 474 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR 475 * at 138 / 144 : 20, because that's the HSYNC timing, that our first 476 * client requires, and that's exactly what leaves us 720 pixels for the 477 * image; we leave VPR[VVP] at default 20 for now, because the client 478 * doesn't seem to have any special requirements for it. Otherwise we 479 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on 480 * the selected standard, and DPR and DSR are selected according to 481 * cropping. Q: how does the client detect the first valid line? Does 482 * HSYNC stay inactive during invalid (black) lines? 483 */ 484 black_left = width_max - VOU_MAX_IMAGE_WIDTH; 485 black_top = 20; 486 487 dsr_h = rect->width + rect->left; 488 dsr_v = frame_out_height + frame_out_top; 489 490 dev_dbg(vou_dev->v4l2_dev.dev, 491 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n", 492 pix->width, frame_in_height, black_left, black_top, 493 rect->left, frame_out_top, dsr_h, dsr_v); 494 495 /* VOUISR height - half of a frame height in frame mode */ 496 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height); 497 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top); 498 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top); 499 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v); 500 501 /* 502 * if necessary, we could set VOUHIR to 503 * max(black_left + dsr_h, width_max) here 504 */ 505 506 if (w_idx) 507 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4); 508 if (h_idx) 509 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1]; 510 511 dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr); 512 513 /* To produce a colour bar for testing set bit 23 of VOUVCR */ 514 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr); 515 sh_vou_reg_ab_write(vou_dev, VOUDFR, 516 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16)); 517} 518 519struct sh_vou_geometry { 520 struct v4l2_rect output; 521 unsigned int in_width; 522 unsigned int in_height; 523 int scale_idx_h; 524 int scale_idx_v; 525}; 526 527/* 528 * Find input geometry, that we can use to produce output, closest to the 529 * requested rectangle, using VOU scaling 530 */ 531static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std) 532{ 533 /* The compiler cannot know, that best and idx will indeed be set */ 534 unsigned int best_err = UINT_MAX, best = 0, img_height_max; 535 int i, idx = 0; 536 537 if (std & V4L2_STD_525_60) 538 img_height_max = 480; 539 else 540 img_height_max = 576; 541 542 /* Image width must be a multiple of 4 */ 543 v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2, 544 &geo->in_height, 0, img_height_max, 1, 0); 545 546 /* Select scales to come as close as possible to the output image */ 547 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) { 548 unsigned int err; 549 unsigned int found = geo->output.width * vou_scale_h_den[i] / 550 vou_scale_h_num[i]; 551 552 if (found > VOU_MAX_IMAGE_WIDTH) 553 /* scales increase */ 554 break; 555 556 err = abs(found - geo->in_width); 557 if (err < best_err) { 558 best_err = err; 559 idx = i; 560 best = found; 561 } 562 if (!err) 563 break; 564 } 565 566 geo->in_width = best; 567 geo->scale_idx_h = idx; 568 569 best_err = UINT_MAX; 570 571 /* This loop can be replaced with one division */ 572 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) { 573 unsigned int err; 574 unsigned int found = geo->output.height * vou_scale_v_den[i] / 575 vou_scale_v_num[i]; 576 577 if (found > img_height_max) 578 /* scales increase */ 579 break; 580 581 err = abs(found - geo->in_height); 582 if (err < best_err) { 583 best_err = err; 584 idx = i; 585 best = found; 586 } 587 if (!err) 588 break; 589 } 590 591 geo->in_height = best; 592 geo->scale_idx_v = idx; 593} 594 595/* 596 * Find output geometry, that we can produce, using VOU scaling, closest to 597 * the requested rectangle 598 */ 599static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std) 600{ 601 unsigned int best_err = UINT_MAX, best = geo->in_width, 602 width_max, height_max, img_height_max; 603 int i, idx = 0; 604 605 if (std & V4L2_STD_525_60) { 606 width_max = 858; 607 height_max = 262 * 2; 608 img_height_max = 480; 609 } else { 610 width_max = 864; 611 height_max = 312 * 2; 612 img_height_max = 576; 613 } 614 615 /* Select scales to come as close as possible to the output image */ 616 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) { 617 unsigned int err; 618 unsigned int found = geo->in_width * vou_scale_h_num[i] / 619 vou_scale_h_den[i]; 620 621 if (found > VOU_MAX_IMAGE_WIDTH) 622 /* scales increase */ 623 break; 624 625 err = abs(found - geo->output.width); 626 if (err < best_err) { 627 best_err = err; 628 idx = i; 629 best = found; 630 } 631 if (!err) 632 break; 633 } 634 635 geo->output.width = best; 636 geo->scale_idx_h = idx; 637 if (geo->output.left + best > width_max) 638 geo->output.left = width_max - best; 639 640 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width, 641 vou_scale_h_num[idx], vou_scale_h_den[idx], best); 642 643 best_err = UINT_MAX; 644 645 /* This loop can be replaced with one division */ 646 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) { 647 unsigned int err; 648 unsigned int found = geo->in_height * vou_scale_v_num[i] / 649 vou_scale_v_den[i]; 650 651 if (found > img_height_max) 652 /* scales increase */ 653 break; 654 655 err = abs(found - geo->output.height); 656 if (err < best_err) { 657 best_err = err; 658 idx = i; 659 best = found; 660 } 661 if (!err) 662 break; 663 } 664 665 geo->output.height = best; 666 geo->scale_idx_v = idx; 667 if (geo->output.top + best > height_max) 668 geo->output.top = height_max - best; 669 670 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height, 671 vou_scale_v_num[idx], vou_scale_v_den[idx], best); 672} 673 674static int sh_vou_s_fmt_vid_out(struct file *file, void *priv, 675 struct v4l2_format *fmt) 676{ 677 struct sh_vou_device *vou_dev = video_drvdata(file); 678 struct v4l2_pix_format *pix = &fmt->fmt.pix; 679 unsigned int img_height_max; 680 int pix_idx; 681 struct sh_vou_geometry geo; 682 struct v4l2_mbus_framefmt mbfmt = { 683 /* Revisit: is this the correct code? */ 684 .code = MEDIA_BUS_FMT_YUYV8_2X8, 685 .field = V4L2_FIELD_INTERLACED, 686 .colorspace = V4L2_COLORSPACE_SMPTE170M, 687 }; 688 int ret; 689 690 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__, 691 vou_dev->rect.width, vou_dev->rect.height, 692 pix->width, pix->height); 693 694 if (pix->field == V4L2_FIELD_ANY) 695 pix->field = V4L2_FIELD_NONE; 696 697 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || 698 pix->field != V4L2_FIELD_NONE) 699 return -EINVAL; 700 701 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++) 702 if (vou_fmt[pix_idx].pfmt == pix->pixelformat) 703 break; 704 705 if (pix_idx == ARRAY_SIZE(vou_fmt)) 706 return -EINVAL; 707 708 if (vou_dev->std & V4L2_STD_525_60) 709 img_height_max = 480; 710 else 711 img_height_max = 576; 712 713 /* Image width must be a multiple of 4 */ 714 v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 2, 715 &pix->height, 0, img_height_max, 1, 0); 716 717 geo.in_width = pix->width; 718 geo.in_height = pix->height; 719 geo.output = vou_dev->rect; 720 721 vou_adjust_output(&geo, vou_dev->std); 722 723 mbfmt.width = geo.output.width; 724 mbfmt.height = geo.output.height; 725 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, 726 s_mbus_fmt, &mbfmt); 727 /* Must be implemented, so, don't check for -ENOIOCTLCMD */ 728 if (ret < 0) 729 return ret; 730 731 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__, 732 geo.output.width, geo.output.height, mbfmt.width, mbfmt.height); 733 734 /* Sanity checks */ 735 if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH || 736 (unsigned)mbfmt.height > img_height_max || 737 mbfmt.code != MEDIA_BUS_FMT_YUYV8_2X8) 738 return -EIO; 739 740 if (mbfmt.width != geo.output.width || 741 mbfmt.height != geo.output.height) { 742 geo.output.width = mbfmt.width; 743 geo.output.height = mbfmt.height; 744 745 vou_adjust_input(&geo, vou_dev->std); 746 } 747 748 /* We tried to preserve output rectangle, but it could have changed */ 749 vou_dev->rect = geo.output; 750 pix->width = geo.in_width; 751 pix->height = geo.in_height; 752 753 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__, 754 pix->width, pix->height); 755 756 vou_dev->pix_idx = pix_idx; 757 758 vou_dev->pix = *pix; 759 760 sh_vou_configure_geometry(vou_dev, pix_idx, 761 geo.scale_idx_h, geo.scale_idx_v); 762 763 return 0; 764} 765 766static int sh_vou_try_fmt_vid_out(struct file *file, void *priv, 767 struct v4l2_format *fmt) 768{ 769 struct sh_vou_device *vou_dev = video_drvdata(file); 770 struct v4l2_pix_format *pix = &fmt->fmt.pix; 771 int i; 772 773 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 774 775 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 776 pix->field = V4L2_FIELD_NONE; 777 778 v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1, 779 &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0); 780 781 for (i = 0; i < ARRAY_SIZE(vou_fmt); i++) 782 if (vou_fmt[i].pfmt == pix->pixelformat) 783 return 0; 784 785 pix->pixelformat = vou_fmt[0].pfmt; 786 787 return 0; 788} 789 790static int sh_vou_reqbufs(struct file *file, void *priv, 791 struct v4l2_requestbuffers *req) 792{ 793 struct sh_vou_device *vou_dev = video_drvdata(file); 794 struct sh_vou_file *vou_file = priv; 795 796 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 797 798 if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 799 return -EINVAL; 800 801 return videobuf_reqbufs(&vou_file->vbq, req); 802} 803 804static int sh_vou_querybuf(struct file *file, void *priv, 805 struct v4l2_buffer *b) 806{ 807 struct sh_vou_device *vou_dev = video_drvdata(file); 808 struct sh_vou_file *vou_file = priv; 809 810 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 811 812 return videobuf_querybuf(&vou_file->vbq, b); 813} 814 815static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) 816{ 817 struct sh_vou_device *vou_dev = video_drvdata(file); 818 struct sh_vou_file *vou_file = priv; 819 820 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 821 822 return videobuf_qbuf(&vou_file->vbq, b); 823} 824 825static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) 826{ 827 struct sh_vou_device *vou_dev = video_drvdata(file); 828 struct sh_vou_file *vou_file = priv; 829 830 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 831 832 return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK); 833} 834 835static int sh_vou_streamon(struct file *file, void *priv, 836 enum v4l2_buf_type buftype) 837{ 838 struct sh_vou_device *vou_dev = video_drvdata(file); 839 struct sh_vou_file *vou_file = priv; 840 int ret; 841 842 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 843 844 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, 845 video, s_stream, 1); 846 if (ret < 0 && ret != -ENOIOCTLCMD) 847 return ret; 848 849 /* This calls our .buf_queue() (== sh_vou_buf_queue) */ 850 return videobuf_streamon(&vou_file->vbq); 851} 852 853static int sh_vou_streamoff(struct file *file, void *priv, 854 enum v4l2_buf_type buftype) 855{ 856 struct sh_vou_device *vou_dev = video_drvdata(file); 857 struct sh_vou_file *vou_file = priv; 858 859 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 860 861 /* 862 * This calls buf_release from host driver's videobuf_queue_ops for all 863 * remaining buffers. When the last buffer is freed, stop streaming 864 */ 865 videobuf_streamoff(&vou_file->vbq); 866 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0); 867 868 return 0; 869} 870 871static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt) 872{ 873 switch (bus_fmt) { 874 default: 875 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n", 876 __func__, bus_fmt); 877 case SH_VOU_BUS_8BIT: 878 return 1; 879 case SH_VOU_BUS_16BIT: 880 return 0; 881 case SH_VOU_BUS_BT656: 882 return 3; 883 } 884} 885 886static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id) 887{ 888 struct sh_vou_device *vou_dev = video_drvdata(file); 889 int ret; 890 891 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id); 892 893 if (std_id & ~vou_dev->vdev.tvnorms) 894 return -EINVAL; 895 896 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, 897 s_std_output, std_id); 898 /* Shall we continue, if the subdev doesn't support .s_std_output()? */ 899 if (ret < 0 && ret != -ENOIOCTLCMD) 900 return ret; 901 902 if (std_id & V4L2_STD_525_60) 903 sh_vou_reg_ab_set(vou_dev, VOUCR, 904 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29); 905 else 906 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29); 907 908 vou_dev->std = std_id; 909 910 return 0; 911} 912 913static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std) 914{ 915 struct sh_vou_device *vou_dev = video_drvdata(file); 916 917 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 918 919 *std = vou_dev->std; 920 921 return 0; 922} 923 924static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a) 925{ 926 struct sh_vou_device *vou_dev = video_drvdata(file); 927 928 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 929 930 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 931 a->c = vou_dev->rect; 932 933 return 0; 934} 935 936/* Assume a dull encoder, do all the work ourselves. */ 937static int sh_vou_s_crop(struct file *file, void *fh, const struct v4l2_crop *a) 938{ 939 struct v4l2_crop a_writable = *a; 940 struct sh_vou_device *vou_dev = video_drvdata(file); 941 struct v4l2_rect *rect = &a_writable.c; 942 struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT}; 943 struct v4l2_pix_format *pix = &vou_dev->pix; 944 struct sh_vou_geometry geo; 945 struct v4l2_mbus_framefmt mbfmt = { 946 /* Revisit: is this the correct code? */ 947 .code = MEDIA_BUS_FMT_YUYV8_2X8, 948 .field = V4L2_FIELD_INTERLACED, 949 .colorspace = V4L2_COLORSPACE_SMPTE170M, 950 }; 951 unsigned int img_height_max; 952 int ret; 953 954 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__, 955 rect->width, rect->height, rect->left, rect->top); 956 957 if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 958 return -EINVAL; 959 960 if (vou_dev->std & V4L2_STD_525_60) 961 img_height_max = 480; 962 else 963 img_height_max = 576; 964 965 v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1, 966 &rect->height, 0, img_height_max, 1, 0); 967 968 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH) 969 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width; 970 971 if (rect->height + rect->top > img_height_max) 972 rect->top = img_height_max - rect->height; 973 974 geo.output = *rect; 975 geo.in_width = pix->width; 976 geo.in_height = pix->height; 977 978 /* Configure the encoder one-to-one, position at 0, ignore errors */ 979 sd_crop.c.width = geo.output.width; 980 sd_crop.c.height = geo.output.height; 981 /* 982 * We first issue a S_CROP, so that the subsequent S_FMT delivers the 983 * final encoder configuration. 984 */ 985 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, 986 s_crop, &sd_crop); 987 mbfmt.width = geo.output.width; 988 mbfmt.height = geo.output.height; 989 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, 990 s_mbus_fmt, &mbfmt); 991 /* Must be implemented, so, don't check for -ENOIOCTLCMD */ 992 if (ret < 0) 993 return ret; 994 995 /* Sanity checks */ 996 if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH || 997 (unsigned)mbfmt.height > img_height_max || 998 mbfmt.code != MEDIA_BUS_FMT_YUYV8_2X8) 999 return -EIO; 1000 1001 geo.output.width = mbfmt.width; 1002 geo.output.height = mbfmt.height; 1003 1004 /* 1005 * No down-scaling. According to the API, current call has precedence: 1006 * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two. 1007 */ 1008 vou_adjust_input(&geo, vou_dev->std); 1009 1010 /* We tried to preserve output rectangle, but it could have changed */ 1011 vou_dev->rect = geo.output; 1012 pix->width = geo.in_width; 1013 pix->height = geo.in_height; 1014 1015 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx, 1016 geo.scale_idx_h, geo.scale_idx_v); 1017 1018 return 0; 1019} 1020 1021/* 1022 * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle 1023 * is the initial register values, height takes the interlaced format into 1024 * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can 1025 * actually only meaningfully contain values <= 720 and <= 240 respectively, and 1026 * not <= 864 and <= 312. 1027 */ 1028static int sh_vou_cropcap(struct file *file, void *priv, 1029 struct v4l2_cropcap *a) 1030{ 1031 struct sh_vou_device *vou_dev = video_drvdata(file); 1032 1033 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 1034 1035 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 1036 a->bounds.left = 0; 1037 a->bounds.top = 0; 1038 a->bounds.width = VOU_MAX_IMAGE_WIDTH; 1039 a->bounds.height = VOU_MAX_IMAGE_HEIGHT; 1040 /* Default = max, set VOUDPR = 0, which is not hardware default */ 1041 a->defrect.left = 0; 1042 a->defrect.top = 0; 1043 a->defrect.width = VOU_MAX_IMAGE_WIDTH; 1044 a->defrect.height = VOU_MAX_IMAGE_HEIGHT; 1045 a->pixelaspect.numerator = 1; 1046 a->pixelaspect.denominator = 1; 1047 1048 return 0; 1049} 1050 1051static irqreturn_t sh_vou_isr(int irq, void *dev_id) 1052{ 1053 struct sh_vou_device *vou_dev = dev_id; 1054 static unsigned long j; 1055 struct videobuf_buffer *vb; 1056 static int cnt; 1057 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked; 1058 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR); 1059 1060 if (!(irq_status & 0x300)) { 1061 if (printk_timed_ratelimit(&j, 500)) 1062 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n", 1063 irq_status); 1064 return IRQ_NONE; 1065 } 1066 1067 spin_lock(&vou_dev->lock); 1068 if (!vou_dev->active || list_empty(&vou_dev->queue)) { 1069 if (printk_timed_ratelimit(&j, 500)) 1070 dev_warn(vou_dev->v4l2_dev.dev, 1071 "IRQ without active buffer: %x!\n", irq_status); 1072 /* Just ack: buf_release will disable further interrupts */ 1073 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300); 1074 spin_unlock(&vou_dev->lock); 1075 return IRQ_HANDLED; 1076 } 1077 1078 masked = ~(0x300 & irq_status) & irq_status & 0x30304; 1079 dev_dbg(vou_dev->v4l2_dev.dev, 1080 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n", 1081 irq_status, masked, vou_status, cnt); 1082 1083 cnt++; 1084 /* side = vou_status & 0x10000; */ 1085 1086 /* Clear only set interrupts */ 1087 sh_vou_reg_a_write(vou_dev, VOUIR, masked); 1088 1089 vb = vou_dev->active; 1090 list_del(&vb->queue); 1091 1092 vb->state = VIDEOBUF_DONE; 1093 v4l2_get_timestamp(&vb->ts); 1094 vb->field_count++; 1095 wake_up(&vb->done); 1096 1097 if (list_empty(&vou_dev->queue)) { 1098 /* Stop VOU */ 1099 dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n", 1100 __func__, cnt); 1101 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1); 1102 vou_dev->active = NULL; 1103 vou_dev->status = SH_VOU_INITIALISING; 1104 /* Disable End-of-Frame (VSYNC) interrupts */ 1105 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000); 1106 spin_unlock(&vou_dev->lock); 1107 return IRQ_HANDLED; 1108 } 1109 1110 vou_dev->active = list_entry(vou_dev->queue.next, 1111 struct videobuf_buffer, queue); 1112 1113 if (vou_dev->active->queue.next != &vou_dev->queue) { 1114 struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next, 1115 struct videobuf_buffer, queue); 1116 sh_vou_schedule_next(vou_dev, new); 1117 } 1118 1119 spin_unlock(&vou_dev->lock); 1120 1121 return IRQ_HANDLED; 1122} 1123 1124static int sh_vou_hw_init(struct sh_vou_device *vou_dev) 1125{ 1126 struct sh_vou_pdata *pdata = vou_dev->pdata; 1127 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29; 1128 int i = 100; 1129 1130 /* Disable all IRQs */ 1131 sh_vou_reg_a_write(vou_dev, VOUIR, 0); 1132 1133 /* Reset VOU interfaces - registers unaffected */ 1134 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101); 1135 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101)) 1136 udelay(1); 1137 1138 if (!i) 1139 return -ETIMEDOUT; 1140 1141 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i); 1142 1143 if (pdata->flags & SH_VOU_PCLK_FALLING) 1144 voucr |= 1 << 28; 1145 if (pdata->flags & SH_VOU_HSYNC_LOW) 1146 voucr |= 1 << 27; 1147 if (pdata->flags & SH_VOU_VSYNC_LOW) 1148 voucr |= 1 << 26; 1149 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000); 1150 1151 /* Manual register side switching at first */ 1152 sh_vou_reg_a_write(vou_dev, VOURCR, 4); 1153 /* Default - fixed HSYNC length, can be made configurable is required */ 1154 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000); 1155 1156 return 0; 1157} 1158 1159/* File operations */ 1160static int sh_vou_open(struct file *file) 1161{ 1162 struct sh_vou_device *vou_dev = video_drvdata(file); 1163 struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file), 1164 GFP_KERNEL); 1165 1166 if (!vou_file) 1167 return -ENOMEM; 1168 1169 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 1170 1171 if (mutex_lock_interruptible(&vou_dev->fop_lock)) { 1172 kfree(vou_file); 1173 return -ERESTARTSYS; 1174 } 1175 if (atomic_inc_return(&vou_dev->use_count) == 1) { 1176 int ret; 1177 /* First open */ 1178 vou_dev->status = SH_VOU_INITIALISING; 1179 pm_runtime_get_sync(vou_dev->v4l2_dev.dev); 1180 ret = sh_vou_hw_init(vou_dev); 1181 if (ret < 0) { 1182 atomic_dec(&vou_dev->use_count); 1183 pm_runtime_put(vou_dev->v4l2_dev.dev); 1184 vou_dev->status = SH_VOU_IDLE; 1185 mutex_unlock(&vou_dev->fop_lock); 1186 kfree(vou_file); 1187 return ret; 1188 } 1189 } 1190 1191 videobuf_queue_dma_contig_init(&vou_file->vbq, &sh_vou_video_qops, 1192 vou_dev->v4l2_dev.dev, &vou_dev->lock, 1193 V4L2_BUF_TYPE_VIDEO_OUTPUT, 1194 V4L2_FIELD_NONE, 1195 sizeof(struct videobuf_buffer), 1196 &vou_dev->vdev, &vou_dev->fop_lock); 1197 mutex_unlock(&vou_dev->fop_lock); 1198 1199 file->private_data = vou_file; 1200 1201 return 0; 1202} 1203 1204static int sh_vou_release(struct file *file) 1205{ 1206 struct sh_vou_device *vou_dev = video_drvdata(file); 1207 struct sh_vou_file *vou_file = file->private_data; 1208 1209 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 1210 1211 if (!atomic_dec_return(&vou_dev->use_count)) { 1212 mutex_lock(&vou_dev->fop_lock); 1213 /* Last close */ 1214 vou_dev->status = SH_VOU_IDLE; 1215 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101); 1216 pm_runtime_put(vou_dev->v4l2_dev.dev); 1217 mutex_unlock(&vou_dev->fop_lock); 1218 } 1219 1220 file->private_data = NULL; 1221 kfree(vou_file); 1222 1223 return 0; 1224} 1225 1226static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma) 1227{ 1228 struct sh_vou_device *vou_dev = video_drvdata(file); 1229 struct sh_vou_file *vou_file = file->private_data; 1230 int ret; 1231 1232 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 1233 1234 if (mutex_lock_interruptible(&vou_dev->fop_lock)) 1235 return -ERESTARTSYS; 1236 ret = videobuf_mmap_mapper(&vou_file->vbq, vma); 1237 mutex_unlock(&vou_dev->fop_lock); 1238 return ret; 1239} 1240 1241static unsigned int sh_vou_poll(struct file *file, poll_table *wait) 1242{ 1243 struct sh_vou_device *vou_dev = video_drvdata(file); 1244 struct sh_vou_file *vou_file = file->private_data; 1245 unsigned int res; 1246 1247 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__); 1248 1249 mutex_lock(&vou_dev->fop_lock); 1250 res = videobuf_poll_stream(file, &vou_file->vbq, wait); 1251 mutex_unlock(&vou_dev->fop_lock); 1252 return res; 1253} 1254 1255/* sh_vou display ioctl operations */ 1256static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = { 1257 .vidioc_querycap = sh_vou_querycap, 1258 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out, 1259 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out, 1260 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out, 1261 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out, 1262 .vidioc_reqbufs = sh_vou_reqbufs, 1263 .vidioc_querybuf = sh_vou_querybuf, 1264 .vidioc_qbuf = sh_vou_qbuf, 1265 .vidioc_dqbuf = sh_vou_dqbuf, 1266 .vidioc_streamon = sh_vou_streamon, 1267 .vidioc_streamoff = sh_vou_streamoff, 1268 .vidioc_s_std = sh_vou_s_std, 1269 .vidioc_g_std = sh_vou_g_std, 1270 .vidioc_cropcap = sh_vou_cropcap, 1271 .vidioc_g_crop = sh_vou_g_crop, 1272 .vidioc_s_crop = sh_vou_s_crop, 1273}; 1274 1275static const struct v4l2_file_operations sh_vou_fops = { 1276 .owner = THIS_MODULE, 1277 .open = sh_vou_open, 1278 .release = sh_vou_release, 1279 .unlocked_ioctl = video_ioctl2, 1280 .mmap = sh_vou_mmap, 1281 .poll = sh_vou_poll, 1282}; 1283 1284static const struct video_device sh_vou_video_template = { 1285 .name = "sh_vou", 1286 .fops = &sh_vou_fops, 1287 .ioctl_ops = &sh_vou_ioctl_ops, 1288 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */ 1289 .vfl_dir = VFL_DIR_TX, 1290}; 1291 1292static int sh_vou_probe(struct platform_device *pdev) 1293{ 1294 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data; 1295 struct v4l2_rect *rect; 1296 struct v4l2_pix_format *pix; 1297 struct i2c_adapter *i2c_adap; 1298 struct video_device *vdev; 1299 struct sh_vou_device *vou_dev; 1300 struct resource *reg_res, *region; 1301 struct v4l2_subdev *subdev; 1302 int irq, ret; 1303 1304 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1305 irq = platform_get_irq(pdev, 0); 1306 1307 if (!vou_pdata || !reg_res || irq <= 0) { 1308 dev_err(&pdev->dev, "Insufficient VOU platform information.\n"); 1309 return -ENODEV; 1310 } 1311 1312 vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL); 1313 if (!vou_dev) 1314 return -ENOMEM; 1315 1316 INIT_LIST_HEAD(&vou_dev->queue); 1317 spin_lock_init(&vou_dev->lock); 1318 mutex_init(&vou_dev->fop_lock); 1319 atomic_set(&vou_dev->use_count, 0); 1320 vou_dev->pdata = vou_pdata; 1321 vou_dev->status = SH_VOU_IDLE; 1322 1323 rect = &vou_dev->rect; 1324 pix = &vou_dev->pix; 1325 1326 /* Fill in defaults */ 1327 vou_dev->std = V4L2_STD_NTSC_M; 1328 rect->left = 0; 1329 rect->top = 0; 1330 rect->width = VOU_MAX_IMAGE_WIDTH; 1331 rect->height = 480; 1332 pix->width = VOU_MAX_IMAGE_WIDTH; 1333 pix->height = 480; 1334 pix->pixelformat = V4L2_PIX_FMT_YVYU; 1335 pix->field = V4L2_FIELD_NONE; 1336 pix->bytesperline = VOU_MAX_IMAGE_WIDTH * 2; 1337 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480; 1338 pix->colorspace = V4L2_COLORSPACE_SMPTE170M; 1339 1340 region = request_mem_region(reg_res->start, resource_size(reg_res), 1341 pdev->name); 1342 if (!region) { 1343 dev_err(&pdev->dev, "VOU region already claimed\n"); 1344 ret = -EBUSY; 1345 goto ereqmemreg; 1346 } 1347 1348 vou_dev->base = ioremap(reg_res->start, resource_size(reg_res)); 1349 if (!vou_dev->base) { 1350 ret = -ENOMEM; 1351 goto emap; 1352 } 1353 1354 ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev); 1355 if (ret < 0) 1356 goto ereqirq; 1357 1358 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev); 1359 if (ret < 0) { 1360 dev_err(&pdev->dev, "Error registering v4l2 device\n"); 1361 goto ev4l2devreg; 1362 } 1363 1364 vdev = &vou_dev->vdev; 1365 *vdev = sh_vou_video_template; 1366 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT) 1367 vdev->tvnorms |= V4L2_STD_PAL; 1368 vdev->v4l2_dev = &vou_dev->v4l2_dev; 1369 vdev->release = video_device_release_empty; 1370 vdev->lock = &vou_dev->fop_lock; 1371 1372 video_set_drvdata(vdev, vou_dev); 1373 1374 pm_runtime_enable(&pdev->dev); 1375 pm_runtime_resume(&pdev->dev); 1376 1377 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap); 1378 if (!i2c_adap) { 1379 ret = -ENODEV; 1380 goto ei2cgadap; 1381 } 1382 1383 ret = sh_vou_hw_init(vou_dev); 1384 if (ret < 0) 1385 goto ereset; 1386 1387 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap, 1388 vou_pdata->board_info, NULL); 1389 if (!subdev) { 1390 ret = -ENOMEM; 1391 goto ei2cnd; 1392 } 1393 1394 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); 1395 if (ret < 0) 1396 goto evregdev; 1397 1398 return 0; 1399 1400evregdev: 1401ei2cnd: 1402ereset: 1403 i2c_put_adapter(i2c_adap); 1404ei2cgadap: 1405 pm_runtime_disable(&pdev->dev); 1406 v4l2_device_unregister(&vou_dev->v4l2_dev); 1407ev4l2devreg: 1408 free_irq(irq, vou_dev); 1409ereqirq: 1410 iounmap(vou_dev->base); 1411emap: 1412 release_mem_region(reg_res->start, resource_size(reg_res)); 1413ereqmemreg: 1414 kfree(vou_dev); 1415 return ret; 1416} 1417 1418static int sh_vou_remove(struct platform_device *pdev) 1419{ 1420 int irq = platform_get_irq(pdev, 0); 1421 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev); 1422 struct sh_vou_device *vou_dev = container_of(v4l2_dev, 1423 struct sh_vou_device, v4l2_dev); 1424 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next, 1425 struct v4l2_subdev, list); 1426 struct i2c_client *client = v4l2_get_subdevdata(sd); 1427 struct resource *reg_res; 1428 1429 if (irq > 0) 1430 free_irq(irq, vou_dev); 1431 pm_runtime_disable(&pdev->dev); 1432 video_unregister_device(&vou_dev->vdev); 1433 i2c_put_adapter(client->adapter); 1434 v4l2_device_unregister(&vou_dev->v4l2_dev); 1435 iounmap(vou_dev->base); 1436 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1437 if (reg_res) 1438 release_mem_region(reg_res->start, resource_size(reg_res)); 1439 kfree(vou_dev); 1440 return 0; 1441} 1442 1443static struct platform_driver __refdata sh_vou = { 1444 .remove = sh_vou_remove, 1445 .driver = { 1446 .name = "sh-vou", 1447 }, 1448}; 1449 1450module_platform_driver_probe(sh_vou, sh_vou_probe); 1451 1452MODULE_DESCRIPTION("SuperH VOU driver"); 1453MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); 1454MODULE_LICENSE("GPL v2"); 1455MODULE_VERSION("0.1.0"); 1456MODULE_ALIAS("platform:sh-vou"); 1457